Transcript

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>> A manhunt under way for Scott Michael Greene, the suspect in the shocking, ambush-style murders of two police officers early Wednesday near Des Moines, Iowa. Scott, age 46, said to be armed, dangerous and on the loose, driving a blue Ford, F-150.>> There's clearly a danger if you're a police officer.

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These guys were gunned down sitting in their car doing nothing wrong. There's somebody out there shooting police officers.>> One officer found dead in the affluent suburb of Urbandale around 1 AM local time. A second found 2 miles away 30 minutes later. Des Moines police saying both appeared to have had no interaction with their shooter, whose motive is unknown.

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The attack comes two years after two New York City police officers were shot dead while in their patrol car in Brooklyn. And earlier this year, officers in Dallas and Baton Rouge, Louisiana were targets of deadly ambushes in response to separate police shootings of two black men. Iowa Governor Terry Branstad saying Wednesday, an attack on public safety officers is an attack on the public safety of all Iowans.